Hard to tell if it's grout bleed or just possibly a mineral reaction with the natural iron in the stone. Try scrubbing with hot purified water and Iron Out or poltice with 35% Hydrogen Peroxide.

Good luck Bill Selik
Gourmet Stone Care


On Monday, April 4, 2016 5:11 PM, stuart rosen <mail@stoneshine.com> wrote:


has that just been installed? I forget the exact reason and this will sound crazy. If you re-wet the stone(do a test) and then use air movers to dry it out I think it may take the stains out.


On Mon, Apr 4, 2016 at 7:24 PM, Stuart Young <santafefc@sbcglobal.net> wrote:
Hi Everyone,

What’s going on in the picture? (Its Lueders Limestone) Anyway to remedy darkness at grout lines?

Thanks

Stuart
Santa Fe Floor Care

Begin forwarded message:

Subject: TX Lueders Limestone - Picture Frame Marks
Date: April 4, 2016 at 12:30:43 PM CDT

Hi Stuart,
Can you take a look at the attached and let me know what you think it is please.
Thanks,

Jose Luis Montoya
(512) 406-4504

 
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